When done right, a scene that utilizes split screen techniques can become unforgettable. Done wrong, and, well . . . %$*@!
5.) Jackie Brown - Adds that extra something during the latter half of the film. I could switch this with Kill Bill, but I personally like the use of it here a little more.
4.) Requiem For A Dream - Used throughout the film to emphasize the effects of the various drugs consumed by the characters. I'd say it worked.
3.) When Harry Met Sally - The bedroom scene in which Harry and Sally are watching television from their own separate bedrooms but split screen to appear they are in the same bed. Amazing dialogue and just plain fun.
2.) Timecode - Four interweaving stories occurring simultaneously, each a single continuous shot. Wow.
1.) The Rules of Attractions - reinventing how a split screen shot can be made; two separate stationary to tracking shots were combined in post-production to give the illusion that they merge into a single widescreen shot. Amazing.